Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“Great app, practical, useful, and easy to use.”
Google Play · 5/5 · 2026-03-06

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 2907673729

Proof data

Record hash (SHA-256): fa5227fd8bab64e3c69c02fcbd70410b4945c811254d63fe53331817be8bbcbe
Signature (Ed25519, base64): 9SaRsBpy0QDKqTK/2eh32UPoHms1+Codug0wt2Jx180LUgMC0SoiHJtG3LmkJoBppgTEz/vENQnsMAYYWayNAg==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["fa5b03dba89882314df0709344e1d0d7e1faffeb521e78940261ff41ea388207","ebf5bcfd13d64d8748c1e46f5d750ae0807bc0863104d76528162b9d102d8417","1441e01a3b30a341e86385c2d717f9894233b01294f40b4a65df479871f31a42","b67627e467232662453cf3bf8cb9fc2a83c4cc510a6581d870726fd6c8196183","bdf363e01d42f51705eb2265889600bc828ed102877f02fe2b12baf85b3ac380","fa201eb00b66d1d5d2ad1e7992dcd90205fd8ac7eaef263f8cdfc5c8612ffe8b","709d957f1d3f5060a00c63846929a8960c12f227aa3d2e18dd0405256dfe998f","03169b9fa65c1de61f71607b3902e7721e65efe2fff54522a1af3e22135bbd0e","89f5db981f3c36e2bd96bfe8ec811080f96e08be49c465cb33f78852e03f71d4","e34df4682f1b51d069b490f515c441bcce6394d17d5ce5081e762d6a54690971","58fcebd1d3d07f3a6ba5f31279f2ecf014cdac37bfe65872be1ec5d6a456940d","e89b125d6d75a826a464fa50668f6e82a6668dbc929bfd3fce7c23cc14adfdbc","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/delivery/en","quote":"Great app, practical, useful, and easy to use.","rating":5,"review_date":"2026-03-06","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (b9a08f9d6d76…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.